G4ToroidalSurface.hh

Go to the documentation of this file.

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
//
// $Id$
//
// ----------------------------------------------------------------------
// Class G4ToroidalSurface
//
// Class Description:
//   
// Definition of a toroidal surface.
 
// Authors: J.Sulkimo, P.Urban.
// Revisions by: L.Broglia, G.Cosmo.
// ----------------------------------------------------------------------
 
#ifndef __G4TOROIDALSURAFCE
#define __G4TOROIDALSURAFCE
 
#include "G4FPlane.hh"
#include "G4OsloMatrix.hh"
 
class G4ToroidalSurface : public G4Surface
{
 
 public:  // with description
 
  G4ToroidalSurface();
  G4ToroidalSurface(const G4Vector3D&, 
            const G4Vector3D&,  
            const G4Vector3D&,  
            G4double, 
            G4double);
  virtual ~G4ToroidalSurface();
    // Constructors & destructor.
 
  inline G4String GetEntityType() const;
    // Returns type identifier of the shape.
 
  G4int Intersect(const G4Ray&);
    // Determines the intersection of a ray with a torus.    
    // Returns 1 if the ray intersects the torus.
 
  void CalcBBox();
    // Computes the bounding-box.
 
  inline G4Vector3D     GetDirection() const;
  inline G4Vector3D     GetAxis()      const;
  inline G4Point3D  GetLocation()  const;
  inline G4double       GetMinRadius() const;
  inline G4double       GetMaxRadius() const;
    // Accessors to geometrical data.
 
  G4double ClosestDistanceToPoint(const G4Point3D& x);
    // Returns the closest distance to the torus surface from a point x.
 
  virtual G4Vector3D SurfaceNormal(const G4Point3D& Pt) const;
    // Returns the Normal unit vector to the G4ToroidalSurface at a point Pt
    // on (or nearly on) the G4ToroidalSurface.
 
  inline void MultiplyPointByMatrix(G4Point3D& Base);
  inline void MultiplyVectorByMatrix(G4Vector3D& DCos);
    // Utility methods.
 
private:
 
  G4ToroidalSurface(const G4ToroidalSurface&);
  G4ToroidalSurface& operator=(const G4ToroidalSurface&);
    // Private copy constructor and assignment operator.
 
  inline G4int IsZero(G4double x) const;
  G4int SolveQuartic(G4double c[], G4double s[]);   
  G4int SolveCubic  (G4double c[], G4double s[]);
  G4int SolveQuadric(G4double c[], G4double s[]);
    // Algorithms for solving quadratic, cubic and quartic equations.
 
private:
 
  G4Axis2Placement3D Placement;
  G4double           MinRadius;
  G4double       MaxRadius;
  G4PointMatrix*     TransMatrix;   // transformation matrix  
  G4Point3D          hitpoint;
  const G4double     EQN_EPS;
 
};
 
#include "G4ToroidalSurface.icc"
 
#endif